Tag Archives: Western toads

The Great Toad Migration

Whistler Western toad migration is almost done!

If you’ve been up at Lost Lake recently, you may have seen these tiny toads behind the black carriers in the wetlands or crossing the paths around you.  You may have even helped us move them off the path (thank you!).

Just in case you didn’t have a chance to see them or to speak with one of the Nature Interpreters at our Discover Nature booth, we’ll be providing answers here to some of the questions people have about the toads and the steps taken to protect them.

The great Western toadlets on their annual migration at Lost Lake. Photo: Kristina Swerhun

Every spring, a female Western toad will lay approximately 12,000 eggs in shallow water.  These eggs become tadpoles in just three to 12 days and are ready to leave the water after six to eight weeks.  At Lost Lake, this means crossing the beach, the Valley Trail and the road to join the adult Western toads in the forests and grasslands.  In nature, less than one per cent of these toads make it to breeding age.  It is our responsibility to make sure human activities don’t increase their mortality rate.

To help the toads survive this journey, the RMOW is working towards a more “toad friendly” environment around Lost Lake Park.  Barriers and fences have been put in place to direct toads towards the forest and nature interpreters from the Whistler Museum’s Discover Nature program educate passersby about this sensitive and protected species.

The toads are helped across the trail by volunteers who also encourage people to walk their bikes and step carefully.

At some point, the toads must cross the Valley Trail and Lost Lake Road on their way to the upland forest areas where they will hibernate for the winter.  To protect them on their journey, Lost Lake Road is closed and people are asked to please watch their step and walk their bikes.

Although the toads are pretty cute, visitors to Lost Lake are asked not to touch the toads with their bare hands as the toads’ skin is very sensitive to human oils and sunscreen.  Picking up the toads or poking them can cause them serious harm or even kill them.

The toadlets blend in well to their surroundings, making them easy to miss.

These steps, which may seem inconvenient, are taken not only to protect a sensitive species but also because Whistler is home to many different creatures, including people.  All of these creatures deserve to be respected.

If you are interested in the Great Toad Migration and would like to help, come visit the Whistler Museum Nature Interpreters at Lost Lake.  We can supply you with gloves and cups and teach you  how to handle the toads without harming them.

If you see the toads anywhere other than Lost Lake, we would love to know!  To report sightings or if you have any questions, please contact us at DiscoverNature@WhistlerMuseum.org.

Kara is a Nature Interpreter with the Whistler Museum’s Discover Nature Program and a recent graduate of Whistler Secondary.  Find her at Lost Lake under the white tent by the concession or on our Nature Walks meeting at the PassivHaus at 11 am Tuesday to Friday until the end of August.

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2017 Western Toad Migration Begins

This past week the annual Western toad migration began again at Lost Lake Park.  Tens of thousands of these tiny toads gradually emerge form the lake to travel to the surrounding forests, though less than one per cent survive the journey.

The tiny toadlets crossing the trail at Lost Lake Park are about the size of a fingertip.

Western toads are found west of the Rockies between Mexico and Southern Alaska.  They will have three different habitats throughout a year: shallow bodies of water during spring breeding season, terrestrial forests and grasslands in the summer, and underground dens for winter hibernation.

The adult toads will migrate to breeding sites in early spring to mate and lay eggs.  One female can lay between 12,000 and 16,000 eggs.  They will then quickly hatch and become tadpoles in three to twelve days.  The speed of their development is highly dependent on the temperature of the water.  In six to eight weeks these tadpoles will then develop into dime-sized, terrestrial dwelling toadlets.  This is when their treacherous journey begins.

By the end of the summer the toadlets will leave the water to join their adult counterparts in the forests and grasslands.  During this life-stage they are easy prey for garter snakes, birds, small mammals and even other amphibians.  They are also easily trodden on because they are so small and well camouflaged.

The toadlets blend in well with their surroundings, making them easy to miss.

Once they have reached their destination, they will hibernate for the duration of winter, usually using existing animal dens or making their own.  It will take two to three years for these toads to mature, and they can live ten years or more, continuing this cycle throughout their lifetime.

Lost Lake is home to the largest population of Western toads in Whistler.  It is unfortunate for the toads that it is one of the most popular beaches in Whistler; however, it creates an amazing opportunity for people to see and understands this process firsthand.  The migration takes two to four weeks, and environmental technicians and volunteers will be on side to direct pedestrians and vehicle traffic, as well as monitor and help the toads cross safely.  Anyone in the park during this time is encouraged to use caution when walking and to get off their bike when travelling on the trails near the park and the beach entrance.

The toads are helped across the trail by volunteers who also encourage people to walk their bikes and step carefully.

Though Western toads are considered relatively common in BC, it is expected that there will be population declines in southern BC as the species has been disappearing in wide ares of their historic range in the US.  This is believed to be a result of a number of factors, the greatest of them being habitat destruction due to development in and around wetlands.  Other causes include rising temperatures, increased UV radiation, and changing water levels due to climate change, traffic on roads and pollution.  The province in monitoring their habits and tracking populations to learn more about how to support this sensitive species.

They are on the provincial yellow list, which means that they are considered a species of conservation concern, and they are a protected species under the BC Wildlife Act.

By Teah Schacter.  Teah is a summer student with the Whistler Museum’s Discover Nature program at Lost Lake.  She recently graduated from Whistler Secondary School and will be attending university in the fall.